Chemical Reactions Test

In a heterogeneous mixture, the substances

• can be physically separated.

• are chemically combined.

• can only be separated through chemical processes.

• break down into new substances.

Which of the following statements is true?

• A solution is a pure substance.

• A solution is a mixture.

• The solvent is dissolved in the solute.

• A solution has the same properties as a colloid.

Milk and sugar water are both​ (a)   . However, milk is a​ (b)   and sugar water is a​ (c)   .

• mixtures
• colloid
• solution
• pure substances

Examine the data table. Why is ethylene glycol used in de-icing fluid for airplanes and other vehicles?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What factors affect the properties of a solution?

Which of the following is an example of a chemical change?

• breaking a rock into smaller pieces

• burning a candle

• stirring butter and sugar together

• adding food coloring to water

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In general, what happens to the rate of reaction when you decrease the temperature of a chemical reaction?

• it decreases

• it increases

• it is unaffected

• it increases, and then decreases

Tags

NGSS.MS-PS1-4

Burning a log is an example of

• an endothermic reaction.

• a solution.

• a catalyst.

• an exothermic reaction.

Tags

NGSS.MS-PS1-4

All chemical changes make a

Tags

NGSS.MS-PS1-2

Milk contains bacteria that carry out chemical reactions to live and reproduce. Why is milk kept in the refrigerator?

Tags

NGSS.MS-PS1-4

NGSS.MS-LS1-5